Siemens Aktiengesellschaft

Michael Gerstner

Bernd Schwinn

Rainer Hauser

Marco Bruell

Christoph Boerzsoenyi

Anand Venkatramani

Ilka Jakubowski

Martin Muellhofer

The invention relates to a circuit breaker for a low-voltage circuit having input and output terminals for conductors of the low-voltage circuit. Within the circuit breaker, the low-voltage circuit can be interrupted or closed. The circuit breaker also has a current sensor which determines the level of the electrical current in the low-voltage circuit and is connected to an electronic trigger unit which has a display for displaying information and interrupts the low-voltage circuit if current limit values or current-time limit values are exceeded. The display is designed to be removable.

Circuit breaker, removable display, and electronic trip unit for a circuit breaker

A circuit breaker system has a circuit breaker with a circuit breaker communication unit. A display unit contains a display housing, and the circuit breaker and the display unit are configured such that the display unit is latched to the circuit breaker. The circuit breaker and the display unit, in the latched state, are connected to one another by a plug connection, such that data of the circuit breaker are displayable on the display unit. A display holder is provided, containing a holder housing and a holder communication unit. The display holder is configured such that the display unit can be latched into the display holder, that the display holder and the display unit, in the latched state, are connected to one another by an electrical plug connection, and that the display holder is configured such that the data of the circuit breaker are displayed in the latched state.

System, circuit breaker, display unit and display holder

A circuit-breaker includes an electronic trip unit, which initiates an interruption or reduction of the current flow in a low-voltage circuit when current or current-time limits are exceeded in the low-voltage circuit. The electronic trip unit includes at least two processors that independently check whether current or current-time limits are being exceeded. A test signal is fed to the circuit-breaker via a first communication interface, which is fed to one of the two processors during operation so that a test of the circuit-breaker is carried out during operation, while at the same time an active protection is provided with regard to the exceeding of current or current-time limits.

Circuit-breaker and mobile device

A display unit and an installation are disclosed for distributing electrical energy. In an embodiment, a display unit includes a plurality of switches. The display unit is connected via a communication link to the switches and is configured to receive data relating to the operation of the switches. Each switch of the installation comprises two mechanically disconnectable switching elements, a sensor unit to detect the current flowing over the switching elements, an electronic trip unit to initiate the disconnection of the switching elements if a trip condition allocated to the switch is fulfilled, and a mechanical switching unit to disconnect the switching elements if the trip condition is fulfilled.

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Roettenbach, Germany

Michael Gerstner